What do you mean by "won't handle" it? Are you saying that the card
itself won't fit in the machine, e.g the card is AGP but the computer
has no AGP bus, or are you saying that fits just fine but won't work
after that? If the latter, were you trying to use the proprietary
nvidia driver? If so, perhaps you didn't have the nouveau kernel
driver blacklisted, and thus the KMS console was activated on boot,
and thus the nvidia binary couldn't directly access the hardware, and
thus it didn't work.
If that's the case, then do some reading about that and/or check the
SlackBuilds.org script and associated files for nvidia-driver.
> When I boot the boot messages are in large text. But about half way
> through the window switches to tiny text. Any alternate console I open
> has the same tiny text.
>
> Is there a cure for this?
You could start with reading CHANGES_AND_HINTS.TXT:
If you want to change the resolution of the KMS console, that can be done
with something like this as a kernel append in lilo.conf:
append="video=1024x768"
-RW